Master SM-350-041 USN 16in/50 (40,6 cm) Mark 7 barrels - for turrets with blastbags (9pcs) - Iowa and Montana classes

American cannon Sea 16 "/ 50 caliber Mark 7 caliber 406 mm was developed just before the outbreak of World War II and entered service in 1943. The initial velocity of the shell fired from this gun was up to 762 m / s. The cannon was capable of firing a projectile weighing up to 1,225 kilograms over a maximum distance of approximately 38,000 meters. It is worth adding that the barrel length of this gun was 50 calibers, i.e. 20.3 meters. American cannon Sea 16 "/ 50 caliber Mark 7 caliber 406 mm was developed as the main armament of Iowa-class battleships (USS Iowa, USS New Jersey, USS Missouri and USS Wisconsin). This type of cannons were mounted in three-barreled turrets, each of the cannons could be raised and lowered separately. The maximum angle of elevation of the barrel was 45 degrees, with the vertical lifting rate of the barrel at 12 degrees per second. It is worth noting that after the end of World War II, the 16 "/ 50 inch Mark 7 naval gun was adapted to firing the Mark 23 (W23) bullet weighing 862 kilograms with a tactical nuclear warhead.